/Engine/Source/Editor/BlueprintGraph/Public/BlueprintActionFilter.h
A list of classes that you want members for. If an action would produce a node with a TargetPin, and that pin is incompatible with one of these classes, then the action is filtered out. Extra data is cached inFTargetClassFilterDataso that it can be reused by filters efficiently.
struct FTargetClassFilterData
TArray<FString...
HiddenCategories
UClass*
TargetClass